Daytech(Manila store) Wireless Intercom for Home Multi-channel Wireless Office Intercom System 1500 Meters Long Range No Phone Bill No Network 21 Channel Recharge Battery for House/Office/Hotel CI05

The communication distance can reach the 1st to 5th floorsThe open distance can reach 1.5 kilometers. Doesn't need network, WIFI, line, or SIM card, Just plug and talk, No other payment except the electricity fee.Signal distance: Floor 1-5, In the open area: 1500 MetersUSB charging or Battery powered: You could plug it in the socket to use, Or put the battery in to take it anywhere. ( Battery is not included, but you could buy the 18650 battery on your own)Totally 21 channels, WIdely use in warehouse, mall, family, hotel and other place needs instant communication.Note: A single device cannot be used alone, two or more must be used to call the intercom.